/*
 *  Copyright (C) 2010-2013 JPEXS
 * 
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 * 
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 * 
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.jpexs.decompiler.flash;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 *
 * @author JPEXS
 */
public class ReReadableInputStream extends InputStream {

   InputStream is;
   ByteArrayOutputStream baos = new ByteArrayOutputStream();
   byte[] converted;
   int pos = 0;
   int count = 0;

   public byte[] getAllRead() {
      return baos.toByteArray();
   }

   public int getPos() {
      return pos;
   }

   public ReReadableInputStream(InputStream is) {
      this.is = is;
   }

   public void setPos(int pos) throws IOException {
      if (pos > count) {
         skip(pos - count);
      }
      this.pos = pos;
   }

   @Override
   public int read() throws IOException {
      if (pos < count) {
         if (converted == null) {
            converted = baos.toByteArray();
         }
         int ret = converted[pos] & 0xff;
         pos++;
         return ret;
      }
      int i = is.read();
      baos.write(i);
      count++;
      pos++;
      converted = null;
      return i;
   }

   @Override
   public int available() throws IOException {
      return (pos < count ? count - pos : 0) + is.available();
   }
}
